First the plus: the shell fits perfectly, is light and slim, Postert good, and if you take no power supply, so everything is fine. (Headphones could be even in a little extra pocket on the back unterbringen- the power supply goes there but not into it)
Negative for me, however, that the bag smelled unlikely to rubber. I own them now for about a year, and it still falls on. I have it, when it was new, washed repeatedly with soap / detergent and water, dried in direct sunlight on the balcony and determined there for three weeks left (even in the rain). But the smell was almost not get rid. ... In the meantime, it has become bearable :-)
On the whole, I'm happy with it because I have a) not found any other bag that fits so well, b) because they barely brushing and the laptop still safely protects.